Contact DermatitisContact dermatitisContact dermatitis is a dermatitis which is caused by something in the outside world which comes into contact with the skin. The offending substance may come into direct contact with the skin or sometimes is carried in the air. If all further contact with this substance is avoided the dermatitis should get better. Contact dermatitis is inflammation of the skin that results from contact of an external substance with the skin. This can occur through one of two mechanisms: irritant or allergic.Allergic Dermatitis where the person becomes sensitised to the offending substance (allergen) - this is a cell-mediated immune reaction. In this case the dermatitis will occur each time the person comes into contact with the allergen, even if in small amounts or for very short periods. | 
